Rotary dressing device.

No. 851,702.

PATENTED APR. 30, 1907.

V. SPIETSOHKA.

ROTARY DRESSING DEVICE.

APPLICATION FILED AUG. 13, 1906.

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UNITED STATES PATENT OFFICE

VINZENZ SPIETSCHKA, OF CLEVELAND, OHIO.

ROTARY DRESSING DEVICE.

No. 851,702.

Specification of Letters Patent. Patented April 30, 1907.

Annlic,V^:on filed August 13,1906.. Serial No, 330,321.

To all whdm it may concern. ' right _of the device contact with commutator

Be it known that I, Vinzenz Spietschka, | 22 and complete the electrical circuit conneca citizen of the Lnited States, residing at j tions within the motor.

Cleveland, in the county of Cuyahoga and I ; State of Ohio, have invented certain new and i useful Improvements in Rotary Dressing Devices; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in i । the art to which it appertains to make and J use the same. ;

. My invention relates to rotary dressing devices,. and the invention comprises the combination of parts all substantially⁷ as hereinafter described and more particularly pointed out in the claims.

The invention is an improvement in that class of motor driven dressing devices adapted to be held to their work by hand, and this particular device is especially adapted for planing, polishing and cleaning the curved walls of large tanks or vats, , as well as floors or other flat surfaces which require evening or dressing.

In the accompanying drawings Figure 1 is a sectional view of my improved device on the longitudinal center thereof. Fig. 2 is an end view of the device as applied in rise. Fig. 3 is a cross section o'f the removable cutter supporting ring. Fig. 4 is a view of the roller frame arms with a coiled spring between.

The device embodies an electric motor which in part comprises a stationary armature 2 having its shaft ends 3 splined or other wise fixed within the ends of arms 4 of handle. 5., Arms 4 are separate right angled pieces having each a semi-circular threaded extension 6 adapted to be brought together and held as one by a threaded sleeve 7 mounted upon handle 5.

The field coils 8 of the electric motor encircle armature 2 and are mounted upon the inner wall of cylindrical casing 9 by field pieces 10 which are screwed into place thereon, by. screws 11. Casing 9 has end plates 12 with bushed hubs 14 which rotate upon armature shaft ends 3 at the side of handle arms 4. Electrical connections 15 for the motor extend from the outside through, bore 16 in shaft end 3 at the left of the device and connect with contact rings 17 and 18 respectively on the said shaft end. Carbon brushes 19 and 20, respectively, convey'the current to the fields with which they are connected and other brushes 21 at the.

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Casing 9 revolves and becomes the motor driven part, and upon this casing 1 mount a suitable dressing tool or instrument, .wliich ill this instance is shown as a ciftter ring 23 slidably splined lengthwise upon casing 9 and detachably secured in place thereon by screws 24. Ling 23 has a series of cv.ttftig blades 25 screwed upon its ribs or bars 26 extending from end to end thereof anil these blades may be staggered in respect to each other to provide an overlapping cut or inclined to the axis to give a shearing cut or they may be substituted by brushes, sand paper parts or other suitable polishing elements (not shown). In fact, as ring 23 is removable, any other ring of like proportion having other dressing instruments, such as buffing tools, may be interchanged therefor. To this end, handle arms 4 are separable to give a knockdown structure adapted to permit interchange of parts, especially of ring 23, although said ring may be made of separable portions as in Fig. 3 to permit its removal without disturbing the other parts.

The depth of cut or degree of contact between the dressing instrument of the device and the surface worked upon is established and. maintained by a guide frame 27 coinprising a pair of parallel rollers 28 carried by sets of diverging arms 29 located at each side of casing 9, and which arms are mounted free upon hubs 14 and are adjustably⁷held in fixed relationship to each other and to the dressing tools by a turnbuckle connection 30. The working plane of the cut= ters may⁷ be changed at. will by changing the angular relation between opposite arms 29, and this is done by adjusting turnbuckle connection 30. Either' handle 5 or the roller supporting frame 27 may⁷ be swung to one side or another of the axial center of the device as may be found most convenient in applying the device to its work. Or the device can be turned end for end to cut in either direction.

A rigid one piece handle. support may be : substituted for arms 4 but handle 5 is preferably removably engaged with stich support as it is often desirable and necessary to use longer handles.

In place of turnbuckle connection 30, I j might employ a coiled spring 31, see Fig. 4, to hold arms 29 in yielding relation and ^ό5

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110 ,702 e'ach end of said cylinder provided with said rollers in their ends and mounted about the axis of said cylinder.

5. In a rotary dressing device, a motor armature and a double armed handle affixed 45 thereto, a rotatable casing having motor fields and contact members mounted in said casing, a dressing tool carrier removably secured upon said casing, and a swinging guide frame for said device having its bearings at 50 each end thereof and outside the path of said casing. . ..

6. In a rotary dressing device, the motor comprising the fixed armature, the revolving fields and current conveying parts and a ro- 55 tatable support for said fields and double armed handle in which said parts- are supported, in combination with a dressing tool removably mounted upon said rotatable support, and a roller guide frame comprising 60 diverging arms at each end and adjustable connections adapted to set said dressing tool to the work.

7. In a rotary dressing device, a motor comprising a stationary armature and ro- 65 tatable fields and a two armed handle in which said armature is mounted, in combination with-a cylindrical casing for said fields, a removable ring about said, casing and cutters removably secured to said ring, 7° and a guide-frame comprising diverging arms and rollers thereon with an ad justabU connection therefor adapted to set si .1 dressing tools to the work.

In testimony whereof I sign this specifica- 75 tion in the presence of two witnesses.

VINZENZ SPIETSCHKA.

Witnesses-:—

R. B. Moser,

C. A. Sell.

Q 861 whereby the depth of cut may be governed by pressure as applied to the device through the handle